@redocly/openapi-core/__tests__/fixtures/refs/hosted.yaml

See https://github.com/Redocly/openapi-cli

openapi: "3.0.3"
info:
  title: bugtest
  version: "1.0"
  description: Demo
  license:
    name: DEMO
    url: https://demo.com
servers:
  - url: http://demo.com/api
paths:
  /customer:
    summary: "Customer scope"
    get:
      summary: "Get demo no refs"
      operationId: GetCustomer
      description: "Returns Demo No Refs"
      responses:
        200:
          description: Demo No Refs
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/Customer"  
components:
  schemas: 
    Customer:
      type: object
      properties:
        customerName:
          type: string
        accounts:
          type: array
          items:
            $ref: "https://someexternal.schema"